Real-World Effectiveness of Zamerovimab and Mazorelvimab and Vaccine for Rabies Grade III Exposure in Nanyang
8. juni 2026 oppdatert av: Synermore Biologics (Suzhou) Co., Ltd.
Post-Exposure Prophylaxis Outcome of Zamerovimab and Mazorelvimab Injection and Rabies Vaccine in Grade III Rabies Exposure Cases From Single-Dog Multiple-Bite Incidents: A Real-World Prospective Study
The objective of this real-world, prospective observational study is to evaluate the clinical effectiveness of zamerovimab and mazorelvimab injection (a human rabies monoclonal antibody cocktail) administered in combination with a standard rabies vaccine for post-exposure prophylaxis (PEP) in individuals with WHO Grade III rabies exposure in Nanyang City, China.
- The study primarily aims to assess:
- The 3-month rabies-free survival rate following PEP initiation.
- The 1-year long-term rabies-free survival rate.
The rabies virus (RABV) carrying rate and genomic epidemiology among offending dogs involved in single-dog multiple-bite incidents.
Eligible participants aged 18 years or older who have sustained a Grade III exposure from a tracked multi-person canine attack event, and have completed wound debridement and initial passive/active immunization within 24 hours prior to screening, will be followed for up to 1 year via telephone or clinic visits to monitor clinical survival.
Studieoversikt
Status
Aktiv, ikke rekrutterende
Intervensjon / Behandling
Detaljert beskrivelse
This prospective, multicenter registry study evaluates the real-world deployment, clinical protection, and safety profile of zamerovimab and mazorelvimab injection (ZM cocktail)- containing two non-overlapping human monoclonal antibodies-in community emergency settings.
Rabies presents a near 100% case-fatality rate upon symptom onset, making immediate and high-potency passive immunization essential during the active-vaccine immunity window (Days 0-7).
Recent regional epidemic resurgences underscore the public health urgency of handling single-dog multiple-bite clusters, where furious rabid animals carry high viral loads and inflict multiple deep lesions.Approximately 80 patients receiving routine post-exposure care will be enrolled.
Participants will receive standard-of-care wound debridement, anatomical infiltration of the ZM cocktail, and a full rabies vaccine regimen.
Joining this registry involves no additional clinical interventions beyond standard medical care; investigators will actively maintain follow-up contacts at 3 months and 1 year to document survival outcomes.
Concurrently, trapped offending dogs will undergo molecular verification via reverse transcription polymerase chain reaction (RT-PCR) and next-generation sequencing (NGS) to map localized viral ecology, providing crucial real-world data to optimize outbreak emergency response frameworks.
Studietype
Observasjonsmessig
Registrering (Antatt)
80
Kontakter og plasseringer
Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.
Studiesteder
-
-
Henan
-
Nanyang, Henan, Kina, 473000
- The Disease Prevention and Control Center of Nanyang
-
-
Deltakelseskriterier
Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.
Kvalifikasjonskriterier
Alder som er kvalifisert for studier
- Voksen
- Eldre voksen
Tar imot friske frivillige
Nei
Prøvetakingsmetode
Ikke-sannsynlighetsprøve
Studiepopulasjon
People aged 18 or older who were bitten by a dog that also bit others, have a serious (Grade III) rabies exposure, and already received wound cleaning, the antibody injection, and the first rabies shot within 24 hours can join.
Beskrivelse
Inclusion Criteria:
- Adults aged ≥18 years at the time of screening.
- Sustained a verified WHO Grade III rabies exposure from a traceable offending dog involved in a multi-person canine attack incident (defined as a single animal attacking multiple individuals within a clustered timeframe/location) in Nanyang City.
- Time interval from Grade III exposure to post-exposure prophylaxis (PEP) initiation is less than 7 days.
- Successfully completed standard wound debridement, anatomical infiltration of zamerovimab/mazorelvimab injection (0.3 mg/kg single full dose), and the first dose of rabies vaccine within 24 hours prior to screening.
- Voluntarily provides signed written informed consent.
- Patient is willing and able to comply with all sequential follow-up procedures (including serum collections if applicable) and intends to reside locally for the full 1-year study duration.
Exclusion Criteria:
- Documented history of any separate animal bite or scratch (e.g., dog, cat, bat, or wild carnivore) within the past 12 months prior to the current exposure.
- Documented complete pre-exposure or post-exposure rabies vaccination history within the past 12 months.
- Concurrent presentation with life-threatening traumatic injuries requiring intensive care, or severe systemic immunodeficiency disorders that could impede immunogenicity or follow-up compliance.
- Any other clinical or psychological condition deemed by the investigator as unsuitable for safe participation or reliable data registry.
Studieplan
Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.
Hvordan er studiet utformet?
Designdetaljer
Kohorter og intervensjoner
Gruppe / Kohort |
Intervensjon / Behandling |
|---|---|
|
Grade III rabies exposure cohort
Adults (≥18 years) who sustained verified WHO Grade III rabies exposure from a traceable dog involved in a tracked multi-person attack incident, and who initiated standardized PEP within the protocolized window.
|
Standard-of-care wound debridement, followed by anatomical infiltration of zamerovimab/mazorelvimab injection at a single dose of 0.3 mg/kg around the wound sites on Day 0, combined with a standard intramuscular rabies vaccine regimen.
|
Hva måler studien?
Primære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
|
3-month rabies-free survival rate
Tidsramme: 90 days (±3 days) post-enrollment
|
The proportion of participants alive and free of clinical rabies symptoms at 90 days following post-exposure prophylaxis (PEP) initiation.
|
90 days (±3 days) post-enrollment
|
Sekundære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
|
1-year rabies-free survival rate
Tidsramme: 365 days (±7 days) post-enrollment
|
The proportion of participants alive and free of clinical rabies symptoms at 1 year following post-exposure prophylaxis (PEP) initiation.
|
365 days (±7 days) post-enrollment
|
Samarbeidspartnere og etterforskere
Det er her du vil finne personer og organisasjoner som er involvert i denne studien.
Studierekorddatoer
Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.
Studer hoveddatoer
Studiestart (Faktiske)
6. juni 2025
Primær fullføring (Faktiske)
31. mars 2026
Studiet fullført (Antatt)
1. desember 2026
Datoer for studieregistrering
Først innsendt
28. mai 2026
Først innsendt som oppfylte QC-kriteriene
28. mai 2026
Først lagt ut (Faktiske)
3. juni 2026
Oppdateringer av studieposter
Sist oppdatering lagt ut (Faktiske)
11. juni 2026
Siste oppdatering sendt inn som oppfylte QC-kriteriene
8. juni 2026
Sist bekreftet
1. mai 2026
Mer informasjon
Begreper knyttet til denne studien
Ytterligere relevante MeSH-vilkår
Andre studie-ID-numre
- SYN023-RWE-001
Plan for individuelle deltakerdata (IPD)
Planlegger du å dele individuelle deltakerdata (IPD)?
NEI
Legemiddel- og utstyrsinformasjon, studiedokumenter
Studerer et amerikansk FDA-regulert medikamentprodukt
Ja
Studerer et amerikansk FDA-regulert enhetsprodukt
Nei
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